Trunk seen in Dorset or Somerset (5)
I believe the answer is:
torso
'trunk' is the definition.
(synonyms)
'in dorset or somerset' is the wordplay.
'in' indicates the answer is hidden within the clue.
'TORSO' can be found hidden inside 'dorset or somerset'.
'seen' is the link.
(Other definitions for torso that I've seen before include "Poorly-dressed child" , "upper body" , "Body's trunk" , "Roots (anag)" , "Piece of bronze" .)